scholarly journals The Comparison of Measured and Simulated Dynamic Responses of Vehicles Indicated by Road Pavement Unevenness

2015 ◽  
Vol 11 (1) ◽  
pp. 10-20
Author(s):  
Martin Decký ◽  
Matúš Kováč ◽  
Peter Kotek
Keyword(s):  
Dynamic Systems ◽  
Design Method ◽  
Dynamic Responses ◽  
Asphalt Pavements ◽  
Heavy Vehicle ◽  
Dynamic Effects ◽  
International Roughness Index ◽  
Road Pavement ◽  
Roughness Index ◽  
Quarter Car

Abstract The article presents the comparison of measured and simulated dynamic responses of heavy vehicle which are indicated by road pavement unevenness. This unevenness was represented by speed control bumps, potholes and stochastic pavement unevenness. The objective simulations were realized through the medium Quarter- Car Simulation by means of application of simulated theory of dynamic systems. The reliability of used model was verificated with comparison of measured and simulated values of sprung mass T815 vehicle accelerations. In the article, there are presented courses of total vertical forces of Quarter-Car Simulation for the first, the second and the fourth classification degree of unevenness, which was considered through the world's respected parameter IRI (International Roughness Index). Obtained simulated dynamic effects of the vehicle on the pavement were used for modification of a relevant Slovak design method of asphalt pavements.

Relationship between International Roughness Index and Power Spectral Density of Asphalt Pavements in China

2013 ◽  
Vol 742 ◽  
pp. 104-108
Author(s):  
Shao Wen Liu ◽  
Xiao Zhang
Keyword(s):  
Spectral Density ◽  
Power Spectral Density ◽  
Response Function ◽  
Asphalt Pavements ◽  
International Roughness Index ◽  
Quarter Car Model ◽  
Pavement Roughness ◽  
Power Spectral ◽  
Roughness Index ◽  
Quarter Car

In this paper, pavement roughness is assumed as random stationary variable and used as the exciting force of theoretical analyses of the quarter car model of International Roughness Index (IRI). From the frequency response function of the quarter car, the response function of the displacement difference between sprung and unsprung mass is obtained based on random process theory. Then the relationship between IRI and power spectral density (PSD) is established from statement characteristic of the response function. Finally, the longitudinal road profiles of typical asphalt roads in China are used to validate the proposed model.

scholarly journals TINJAUAN KONDISI PERKERASAN JALAN DENGAN KOMBINASI NILAI INTERNATIONAL ROUGHNESS INDEX (IRI) DAN SURFACE DISTRESS INDEX (SDI) PADA JALAN TAKENGON – BLANGKEJEREN

2018 ◽  
Vol 1 (3) ◽  
pp. 543-552
Author(s):  
Baihaqi Baihaqi ◽  
Sofyan M. Saleh ◽  
Renni Anggraini
Keyword(s):  
Road Surface ◽  
Road Segment ◽  
International Roughness Index ◽  
Damage Level ◽  
The Road ◽  
Road Pavement ◽  
Roughness Index ◽  
Surface Distress ◽  
Observation Method ◽  
Pavement Damage

Abstract: Takengon - Blangkejeren road is one of the cross national roads connecting Central Aceh Regency with Gayo Lues Regency. This road is in the mountainous terrain and often passed by heavy loaded vehicles so that often damaged. To overcome the frequent damage to this road segment, it is necessary to conduct a research on road pavement damage. The purpose of this research is to know the condition of road damage based on the combination of International Roughness Index (IRI) and Surface Distress Index (SDI). This study uses direct observation method in the field by conducting a visual survey of road pavement conditions. The result of the research shows that the total damage level of road surface is 30,54% while the road surface is not damaged by 69,46% from total of road that become research object, that is 12,63 Km divided into 6 road segment. For the overall condition of roads reviewed 45.02% good, 45.81% medium, 6.87% lightly damaged, 2.29% heavily damaged.Abstrak: Ruas jalan Takengon – Blangkejeren merupakan salah satu ruas jalan nasional lintas tengah yang menghubungkan Kabupaten Aceh Tengah dengan Kabupaten Gayo Lues. Jalan ini berada pada medan pegunungan dan sering dilalui kendaraan dengan beban yang berat sehingga sering mengalami kerusakan. Untuk mengatasi kerusakan yang sering terjadi pada ruas jalan ini perlu diadakan suatu penelitian mengenai jenis kerusakan perkerasan jalan. Tujuan dari penelitian ini adalah untuk mengetahui kondisi kerusakan jalan berdasarkan kombinasi nilai International Roughness Index (IRI) dan Surface Distress Index (SDI). Penelitian ini menggunakan metode pengamatan langsung dilapangan dengan melakukan survey secara visual terhadap kondisi perkerasan jalan. Dari hasil penelitian diperoleh tingkat kerusakan keseluruhan permukaan jalan adalah sebesar 30,54% sedangkan permukaan jalan yang tidak mengalami kerusakan sebesar 69,46 % dari total panjang jalan yang menjadi objek penelitian, yaitu 12,63 Km yang dibagi menjadi 6 buah segmen jalan. Untuk kondisi keseluruhan jalan yang ditinjau 45,02 % baik, 45,81 % sedang, 6,87 % rusak ringan, 2,29 % rusak berat.

scholarly journals Improvement of Boeing Bump Method Considering Aircraft Vibration Superposition Effect

2021 ◽  
Vol 11 (5) ◽  
pp. 2147
Author(s):  
Shifu Liu ◽  
Yu Tian ◽  
Le Liu ◽  
Peng Xiang ◽  
Zhekai Zhang
Keyword(s):  
Dynamic Responses ◽  
International Roughness Index ◽  
Pavement Preservation ◽  
Long Wave ◽  
Airport Pavement ◽  
Pavement Evaluation ◽  
Roughness Index ◽  
Response Thresholds ◽  
Roughness Evaluation ◽  
Superposition Effect

Pavement evaluation is critical for the decision-making process of pavement preservation and rehabilitation. Roughness is a key airport pavement characteristic that has been linked to impacts such as safety and service life. The Boeing Bump is one of the few roughness evaluation methods that has been developed specifically for runways. Although it is superior to the widely used International Roughness Index (IRI), it does not take into account the superposition effect of continuous runway bumps. Based on the ADAMS/Aircraft virtual prototype platform, this paper establishes and verifies five typical models (B737, B747, B757, B777, and B787) and then analyzes the most unfavorable speed (in terms of aircraft vibration) of each model and the dynamic responses caused by multiple bumps. The original Boeing Bump is improved and optimized by determining dynamic response thresholds for the various aircraft types. The results show that the revised Boeing Bump is more realistic than the original version, especially with regard to medium and long wave bands.

scholarly journals Optimization of International Roughness Index Model Parameters for Sustainable Runway

2021 ◽  
Vol 13 (4) ◽  
pp. 2184
Author(s):  
Yu Tian ◽  
Shifu Liu ◽  
Le Liu ◽  
Peng Xiang
Keyword(s):  
Frequency Response ◽  
Dynamic Responses ◽  
Model Parameters ◽  
Response Distribution ◽  
Iri Model ◽  
International Roughness Index ◽  
Pavement Roughness ◽  
Study Results ◽  
Roughness Index ◽  
Roughness Evaluation

Pavement roughness is a critical airport pavement characteristic that has been linked to impacts such as safety and service life. A properly defined roughness evaluation method would reduce airport operational risk, prolong the life of aircraft landing gear, and optimize the decision-making process for pavement preservation, which together positively contribute to overall airport sustainability. In this study, we optimized the parameters of the International Roughness Index (IRI) model to resolve the current poor correlation between the IRI and aircraft vibration responses in order to adapt and extend the IRI’s use for airport runway roughness evaluation. We developed and validated a virtual prototype model based on ADAMS/Aircraft software for the Boeing 737–800 and then employed the model to predict the aircraft’s dynamic responses to runway pavement roughness. By developing a frequency response function for the standard 1/4 vehicle model, we obtained frequency response distribution curves for the IRI. Based on runway roughness data, we used fast Fourier transform to implement the frequency response distribution of the aircraft. We then utilized Particle Swarm Optimization to determine more appropriate IRI model parameters rather than modifying the model itself. Our case study results indicate that the correlation coefficient for the optimized IRI model and aircraft vibration response shows a qualitative leap from that of the original IRI model.

scholarly journals PENILAIAN KONDISI PERKERASAN JALAN BERBASIS PERANGKAT LUNAK PADA RUAS JALAN YOGYAKARTAMAGELANG

Jurnal HPJI ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 109-118
Author(s):  
Wan Aswin Winardi ◽  
Agus Taufik Mulyono ◽  
Suryo Hapsoro Tri Utomo
Keyword(s):  
Condition Index ◽  
Remaining Life ◽  
International Roughness Index ◽  
Pavement Condition ◽  
Surface Conditions ◽  
Index Data ◽  
Road Pavement ◽  
Roughness Index ◽  
Pavement Condition Index ◽  
Surface Distress

Abstract In this study a software-based modeling study that can accommodate the needs to determine the surface conditions of pavement, plan for handling road damage, and predict the remaining life of pavement services. The data used in this study are primary data from the Pavement Condition Index survey on a Yogyakarta–Magelang road segment Magelang, KM 10+000-KM 11+000, and secondary data, in the form of Surface Distress Index data, International Roughness Index data, and traffic data obtained from the National Road Planning and Supervision of the Special Province of Yogyakarta. The software used in this study is Borland Delphi 7.0 software. From this study, a software called Modrova was produced. This study shows that the Modrova software is valid to use because the resulting error is relatively small. Keywords: road surface conditions, road damage, road pavement, remaining life of road pavement  Abstrak Pada studi ini dikaji suatu pemodelan berbasis perangkat lunak yang dapat mengakomodir kebutuhan untuk menentukan kondisi permukaan perkerasan jalan, merencanakan penanganan kerusakan jalan, serta mempre-diksi sisa umur layanan perkerasan jalan. Data yang digunakan pada penelitian ini adalah data primer hasil survei Pavement Condition Index pada ruas jalan Yogyakarta-Magelang, KM 10+000-KM 11+000 dan data skunder, berupa data Surface Distress Index, data International Roughness Index, serta data lalu lintas yang diperoleh dari Perencanaan dan Pengawasan Jalan Nasional Provinsi Daerah Istimewa Yogyakarta. Perangkat lunak yang digunakan pada studi ini adalah perangkat lunak Borland Delphi 7.0. Dari studi ini dihasilkan suatu perangkat lunak yang diberi nama Modrova. Studi ini menunjukkan bahwa perangkat lunak Modrova valid untuk digunakan karena kesalahan yang dihasilkan relatif kecil. Kata-kata kunci: kondisi permukaan jalan, kerusakan jalan, perkerasan jalan, sisa umur perkerasan jalan

Evaluation and Implementation of Automated Profilogram Reduction System: APPARE

1996 ◽  
Vol 1545 (1) ◽  
pp. 16-25
Author(s):  
J. Jim Zhu ◽  
Wenli Zhu ◽  
Thomas Smailus ◽  
Mark Martinez
Keyword(s):  
Profile Analysis ◽  
Test Procedure ◽  
Field Evaluation ◽  
International Roughness Index ◽  
Road Pavement ◽  
Roughness Index ◽  
Extensive Test ◽  
Computer Based ◽  
Band Profile ◽  
Transportation Research

APPARE is a personal computer–based scanner and software system to aid in automated pavement profile analysis and roughness evaluation. The system was developed for the Louisiana Department of Transportation and Development (LDOTD) and the Louisiana Transportation Research Center (LTRC). It analyzes the statistical properties of road-pavement profiles and reports their roughness according to indexes such as the international roughness index and the profile index. APPARE can process profilograms and other digitized road profiles. Field evaluation results conducted by LTRC and Districts 03, 04, and 62 of LDOTD on a total of 126.8 km (79.1 mi) of newly constructed pavements are reported. On the basis of these extensive test data and comparison of APPARE with alternatives, LDOTD recently decided to adopt APPARE as its standard profilograph test procedure for quality control and acceptance of newly constructed pavement. Statewide implementation of APPARE is under way, and a new profilograph test procedure, DOTD TR 641, is being developed by the Materials and Testing Section of LDOTD. The implementation was complete by the end of 1995. In addition, LTRC has moved that the blanking-band profile index be abolished and that the international roughness index evaluated by APPARE be used instead as the standard roughness index reported by a profilograph.

Using the International Roughness Index for Profilograph Trace Reduction

1996 ◽  
Vol 1536 (1) ◽  
pp. 90-93
Author(s):  
Steven L. Cumbaa
Keyword(s):  
United States ◽  
Flexible Pavements ◽  
The United States ◽  
Evaluation Procedure ◽  
Iri Model ◽  
International Roughness Index ◽  
Rigid Pavements ◽  
Roughness Index ◽  
Finished Surface ◽  
Quarter Car

Current Louisiana acceptance specifications for 100 percent payment require Profile Indexes (PIs) completed pavement surface to as low as 3.0 in./mi for flexible pavements and 6.0 in./mi for rigid pavements. These acceptance specifications are currently among the most stringent in the United States. Requiring an acceptance PI value of less than 7.0 in./mi when using the California-style profilograph and the 0.2 in. blanking band is unacceptable unless the blanking band is eliminated from the procedure. Louisiana's efforts to replace the blanking-band evaluation procedure with a procedure that inputs the profile trace into the quarter-car-based International Roughness Index (IRI) model are presented. The key step in this process is the scanning and digitization of the profilo-gram before determining the IRI based on the filtered profile trace. A much better correlation exists between the rideability of the finished surface and the profilograph IRI than that of the profilograph PI. New profilograph IRI specifications are recommended to replace the existing PI specifications.

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